linux.conf.au, January 2003
      PROGRAMMING: kernel/sched.c

 	new_array:
 		/* Start searching at priority 0: */
 		idx = 0;
 	skip_bitmap:
 		if (!idx)
 			idx = sched_find_first_bit(array->bitmap);
 		else
 			idx = find_next_bit(array->bitmap, MAX_PRIO, idx);
 		if (idx == MAX_PRIO) {
 			if (array == busiest->expired) {
 				array = busiest->active;
 				goto new_array;
 			}
 			goto out_unlock;
 		}
 	
 		head = array->queue + idx;
 		curr = head->prev;
 	skip_queue:
 		tmp = list_entry(curr, task_t, run_list);
 	
 		/*
 		 * We do not migrate tasks that are:
 		 * 1) running (obviously), or
 		 * 2) cannot be migrated to this CPU due to cpus_allowed, or
 		 * 3) are cache-hot on their current CPU.
 		 */